Yes, yips is a Scrabble word!
...and is worth 9 points in Scrabble, and 9 points in Words with Friends
yips
Verb
1. Bark in a high-pitched tone
Noun
1. Nervous tension that causes an athlete to fail (especially causes golfers to miss short putts)
2. A sharp high-pitched cry (especially by a dog)
What Scrabble words can I make with the letters in yips?
3 Letter Words
2 Letter Words